<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- ka片试图 -->
    <el-card>
      <!-- 提示 -->
      <el-alert title="消息提示的文案" type="info" center show-icon :closable="false"> </el-alert>
      <!-- 步骤条 -->
      <el-steps :space="200" :active="activeIndex - 0" align-center finish-status="success">
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tabs -->
      <el-form :model="addForm" label-position="top" :rules="addFormRules" ref="addFormRef" label-width="100px" class="demo-ruleForm">
        <el-tabs v-model="activeIndex" :before-leave="tabBeforeLeave" :tab-position="'left'" @tab-click="tabClick">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader v-model="addForm.goods_cat" :options="catList" :props="cateProps" expandTrigger="hover" @change="handleChange"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cd" border v-for="cd in item.attr_vals" :key="cd"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- 图片上传 -->
            <el-upload
              class="upload-demo"
              :action="upLoadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="onSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品的按钮 -->
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
      <!-- prviewImg -->
      <el-dialog title="预览图片" :visible.sync="dialogVisibleImg" width="50%">
        <img class="imgPrview" :src="previewPath" alt="" />
      </el-dialog>
    </el-card>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data() {
    return {
      addFormRules: {
        goods_name: [{ required: true, message: '请输入商品名称', trigger: 'blur' }],
        goods_price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }],
        goods_weight: [{ required: true, message: '请输入商品重量', trigger: 'blur' }],
        goods_number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }],
        goods_cat: [{ required: true, message: '请选择', trigger: 'blur' }]
      },
      activeIndex: '0',
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,

        goods_cat: [],

        // 上传的图片临时路径（对象）
        pics: [],
        // 商品的参数（数组），包含 `动态参数` 和 `静态属性`
        attrs: []
      },
      catList: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      manyTableData: [],
      onlyTableData: [],
      //   上传图片地址
      upLoadUrl: 'http://127.0.0.1:8888/api/private/v1/upload',
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      //   预览图片的路经
      previewPath: '',
      dialogVisibleImg: false
    }
  },
  methods: {
    async getCatList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取数据失败!')
      }
      //   console.log(res.data)
      this.catList = res.data
    },
    handleChange() {
      console.log(this.addForm.goods_cat)
    },
    tabBeforeLeave(activeIndex, oldActiveName) {
      //   console.log(oldActiveName)
      //   console.log(activeIndex)
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.info('请选择商品分类')
        return false
      }
    },
    async tabClick() {
      console.log(this.activeIndex)
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'many' }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取商品参数失败!')
        }

        res.data.forEach((item) => {
          item.attr_vals = item.attr_vals.length !== 0 ? item.attr_vals.split(' ') : []
        })
        this.manyTableData = res.data
        console.log(res.data)
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'only' }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取商品静态属性失败!')
        }
        console.log(res.data)
        this.onlyTableData = res.data
      }
    },
    // 图片预览
    handlePreview(file) {
      console.log(file)
      this.previewPath = file.response.data.url
      this.dialogVisibleImg = true
    },
    handleRemove(file) {
      //   console.log(file)
      //   1.通过返回值得到将要删除图片路径
      const filePic = file.response.data.tmp_path
      //   2.再通过filePic和 从 pics 数组中， 得到将要删除的index
      const i = this.addForm.pics.findIndex((item) => item.pic === filePic)
      //   在this.addForm.pics 删除对应index的图片
      this.addForm.pics.splice(i, 1)
      //   console.log(this.addForm)
    },
    // 图片上传成功后
    onSuccess(response) {
      console.log(response)
      // 1. 拼接得到一个图片信息对象
      const picInfo = { pic: response.data.tmp_path }
      // 2. 将图片信息对象，push 到pics数组中
      this.addForm.pics.push(picInfo)
      //   console.log(this.addForm)
    },
    // 添加商品按钮
    add() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          return this.$message.error('请填写完整的商品信息!')
        }
        // 执行添加的业务逻辑
        // lodash   cloneDeep(obj)
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        console.log(form)

        // 发起请求添加商品
        // 商品的名称，必须是唯一的
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败!')
        }
        this.$message.success('添加商品成功!')
        console.log(res.data)
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  },
  created() {
    this.getCatList()
  }
}
</script>

<style lang="scss" scoped>
.el-tabs {
  margin-top: 20px;
}
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.imgPrview {
  width: 100%;
}
.btnAdd {
  margin-top: 15px;
}
/deep/.ql-editor {
  height: 260px !important;
}
</style>
